Carbureter.



W. M. HUGHES.-

CARBURETER.

APPLICATION FILED APR.22,19I6.

Emma May '3, 1918.

TA QZWLQQ Q warren easier um litres MARTIN sutures, or aanctrrrn, NEAR s'rnivn'r, new scorn: WALES, nusrrtntra.

CARIBURETER.

r assess Specification of Letters .Yatent.

Patented May '3 I! '0 aZZ whom it may concern:

Be it known that lVlLLIAM Manna Hoonns, subject of the King of Great Britaim and Ireland, residing at Anona, Gipps street, lirnchfie, near Sydney, New South W ales, Australia, has invented certain new and useful Improvements in Carbureters, of

which the following is a specification.

This invention relates to carburetors tor air gas making machines of the type in which volatile oil or oil spirit is supplied and olistrihu'tedoveran extensive surface above which surface air at normal temperature undergoing carburetion is caused to pass.

According to this invention the carbureter comprises a number of nearly horizontally disposed superposed closed shallow pans or traps containing wire gauze packing and connected together at alternate ends in zigzag order. These pans or trays are slightly inclined relative to true horizontal position in order to cause a delayed lingering flow of the carbureting oil or oil spirit in the same direction as theair current which passes through them, and to hold a limited quantity of oil or oil spirit to be retained. in them.

in the accompanying drawings:

Figure l is a perspective sectional view of an air-gas machine and spring drive motor operating the same;

Fig. 2 is a transverse section through the gas bell and the carburetor which is con tained'within it;

Fig. 8 is another section through the said hell showing the'carbureter in end elevation and certain details of construction in section. p

10 is a spring drum, and 11 a gang of spiral springs mounted on the fixed axle 12 thereof. Said drum 10 drives a fussemachine 22 is of an ordinary type commonly used in connection with air-gas making machines. On the shaft 21 a multiple cam 23 is keyed; this cain coacts with a pawl lever Qa Which is reciprocated as each cam face The passes over its contact end. The p 24-. is connected to plunger rod through a stalling be 26 in of a pump barrel A helical spring 28 in compression keeps the pawl in contact with the face of the cam 23, and an adupper end justing nut 29 serves to set the l ver so to hunt therange of movement l e lunger rod at each contact of t foot of the barrel 27 is connec 30. The lower end of: a sta fitted into this well, and. an isconnected into the app pipe 31. 33 is a check valve which oil from the oil tank 34; to the pipe but not reversely. 35 is a check valve which passes oil upwardly only from the vpump into the oil service pipe 36. The service pipe 86 is brought up through the bottom of the water well 37, as shown at 38, and its upper end is returned into the trap chamber 39/ which is charged with sufficient mercury to form a seal. From the head 4H) oi this trap chamber the oil passes througlji. the pipe connection 41 into the uppermost pan or t ay oi the carburetor. 42 is a float bell, forming with the water well 3-? a container within which the carburetor is in.- stalled. The carburetor is immersed in the water in the well 37 and liability to freez ing under cold working conditions thus minimized, The carbureter may be set up ex-. ternally to the gas container. Air from the delivered into the carburetor as hot re stated through the pipe co tnection 41. Wat-er and nnvolatilized res dual liqu d from the foot of the carburetor may e drawn off through the foot valve 4-3. Carbureted air is taken from the lottest tray of the carburetor through the starld pipe 4st,

. the upper end of which is above water level water level, in the water-well 37, and its.

lower and is brought out .tht tugh the hotire tom of the water well and is fitted with a control valve 51, whence a pipe 52 conveys .i gas to the place of use. 53 is a guide of any suitable type for maintaining verticality of movement of the bell 42.

The carbureter comprises a nl'unber of shallow closed pans or trays of rectangular form connected together at alternate ends to form a zig-zag with the courses thereof located one abo e the other and disposed nearly horizontally, with the connections disposed vertically. These pans or trays and their end connections are constructed of sheet metal; each pan or tray is loosely packed withfine wire gauze corrugated or crimped up as shown at ($0 transversely of the direction of air and oil through the trays.

The first tray 61 is set on a considerable downward inclination, and the second tray 62 is set approximately horizontally .in the direction of its length. Thereafter to the lowermost tray of the series, the succeeding trays are set .more or less inclined to the horizontal the angularity increasing gradually toward the bottom of the carbureter. The inclination is upward from the point of entry of the oil to the point of overflow of same into the .next tray below. The first tray 63 below the horizontal tray 62 is almost horizontal but is inclined very slightly upwardly in the direction shown by the ar- -row above it. The next tray 6i is'inclined upward in the opposite direction at a slightly greater angle, as shown by the ar-. row above it; and so on for each succeeding tray 65, 6'6 67 'and 68, the lowermost tray 69 being horizontal and terminating in a foot box 70.from which surplus oil may be 'drawnofl through the foot valve 43*.

The method of operation is as follows:- The spring motor being wound or other .means supplied. to rotate the shaft -21, air

v is forced lo --the pump 22 through the air pipe 42 an inlet 43 into the top tray 61 of the carbureter. As the shaft 21 rotates, carrying with it the cam 23, the pawl 24 is reciprocated and the plunger moved in the pump barrel 27, the range of stroke being determined by the adjustment of the nut 29. The movement of the plunger in the pump barrel 27 causes surging; to and fro of mercury contained in the foot box 30, each downward movement of the plunger forcing the mercury up in the stand pipe 31 and so forcing oil out of said standpipe 31 through the check valve 35 and, through the pipe 36 into the top of the carburetor at the connection 41. At each reverse movement of the pump plunger the mercury in the foot box 30 is drawn back into the barrel 27 with the result that another charge of oil is drawn- .into the pipe 31 from the oil reservoir 3% through the check valve 33. The quantity of oj-l delivered to the carbureter during each revolution of the air drum is thus controlled by adjusting the nut 29. Mercury contained in' the trap 39 insures immediate service of oil to the carburetor when the machine is started up. The oil which passes up through the pipe 36 is forced through the mercury in the trap 39. and thence, passing through the stand pipe -10, goes through the connectionel into the top of the carbureter as before stated. Air and oil are thus supplied SlllllllttlllBOllSlV into the top tra -y til. of the carhureter. As the oil flows downward it films the surface of the tray (51, thence passing into the tray 62 it tihns its surface and in that tray and in succeed ing trays also charges the meshes of wire gauze 60 so that a very large vaporizing surface through and-over which the air passes is maintained in an oil filmed condition. A shallow bodyof oil is retained in the lower portion of each of the trays 63 to 68, and is replenished constantly in each of those trays by oil which overflows from the preceding trays respectively, and the oil feed is regulated by adjusting the nut 29 so that a negligible quantity of vaporizible oil finds its way to the foot box 70, practically the whole of the feed being vaporized and taken up by the air in passing through the circuit -oftrays from the inlet e3 to the delivery pipe a l. If the gas obtained with this adustment is found to be too rich :1. further adjustment of the nut 29 serves to diminish the feed of oil per unit volume of air, and in this way any required dilution of the gas may be arranged while the machine is in operation. When the inflow into the bell 42 has so far exceeded the demand that the bell has lifted to its top position, the-lever 47 is' lifted bymeans of the chain 48 and the valve 46 closed, which happening, the inflow of air is checked and the air pump 22 is brought to rest until gas is again drawn from the bell. In thedlrawing the size of the spring motor relative to the gas holder and earbureter has been exaggerated'to facilitate illustration 'of the necessary detail.

What I claim as my invention and desire of said trays, and means for educting airgasand liquid. residue from the lowermost of said trays. 2. A carburetar for an air-gas making machine comprising aseries of superposed closed flat bottomed trays or chambers connected in zig-zag order at alternate ends, whereof the trays or chambers intermediate in the series are inclined upwardly in the .siyely through the series,

.ing air-gas and liquid residue from the lowermost of said trays 0r chambers.

3. A carburebcr for an air-gas making machine-comprising a series of superposed closed flat bottomed trays or chambers packed-with corrugated wire gauze slips, saidtrays or chambers connected in zig-zag orderat alternate ends, and those intermel-w diate in the series inclined upwardly in the direction of flow of air'through them, the angle of inclination increasin progressively through the series, in com mation Wit means for introducing air and volatile oil under pressure into the uppermost of said 20 trays or chambers and means for educting air gas and liquid residue from the lowermost of said trays or chambers.

In testimony whereof I have aifixed my signature in presence of tWo w tnesses.

WILLIAM MARTIN HUGHES. Witnesses H. C. CAMPBELL, W. I. DAVIS. 

